Let-off mechanism for looms



Patented Jan. 24, I899 J. H. NORTHROP. LET-OFF MECHANISM FOR LOOMS.

(Application filed Oct. 6, 1898.)

( No Model.)

UNITED STATES JAMES H. NORTI-IROP, OF IIOPEDALE,

MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

LET-OFF MECHANISM FOR LQOMS SPECIFICATION forming part of Letters Patent No. 618,363, dated January 24, 1899.

Application filed October 6, 1898.

To all whom it may concern:

v Be it known that I, J AMES I-I. NORTHROP, of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Let-Off Mechanism for. Looms, of which the following description, in connection with the accompanying drawings,is a specification, like letters and numerals on the drawings representing like parts;

This invention has for its object the production of means for permitting the whip -roll stand of let-off mechanism to be raised or lowered, as desired, without interfering with the position or operation of the other parts of the :5 mechanism.

Figure 1 is aside elevation of a loom provided with let-off mechanism embodying my invention, and Fig. 2 is a detail in end ele- Vation of the self-adjusting coupling or connection between the whip-roll rocker-arm and the let-off mechanism.

I have herein shown my invention as applied to the well-known Bartlett let-off mechanism, which latter includes a rocking carrier for the whip-roll W,the carrier comprising the supporting-arms (1, attached to a rock-shaft a, which latter has a depending rocker-arm aipivotally connected with a bent rod b, longitudinally movable in a fixed bearing b on the 0 loom side A, said rod having springs 8 8 the latter being held between an adjustable collar b on the rod and the perforated end of a lever c. A link 0', broken off in Fig. 1, con nects the lever with the usual pawl-carrier,

(not shown,) and a collar 0 on the link is engaged by the actuator-rod 0 shown in Fig. l as connected with and operated by the laysword A Usually the rod 6 is jointed or pivoted directly upon the rocker-arm a but I have herein made the stands A for the whip-roll rockshaft of vertically adjustable 'by means of set screws or bolts 3 and vertical slots 4 in the loom sides, and as the stands can be raised or lowered, as desired, I have devised a simple and efficient self-adjusting coupling or connegtzion between the rocker-arm a and the r0 Referring to Fig. 2, the lower end of the Serial No. 692,792. (No model.)

rocker-arm a is provided with a boss a which supports a headed pin or stud a, the latter entering a longitudinally-slotted upright fin b on the sleeve-like body 11 of the coupling member, which latter receives the end of the tension-rod b and is secured thereupon by setscrews 5. The stud a enters the slot 10, and when the whip-roll stands A are vertically adjusted the stud slides up or down along the slot, so that the position and operation of the other parts of the let-off will not be interfered with in the least, while the pivotal connection between the rocker-arm a and rod 12 is always maintained.

Having fully described my invention, what I claim, and desire to secure by Letters Pat cut, is-- 1. In a let-off mechanism for looms, a rocking whip-roll carrier, a rocker-arm attached thereto,vertically-adj ustable supports for the said carrier, a tension-rod,and a self-adj usting connection between it and said rocker-arm, to compensate for adjustment of the supports.

2. In a let-off mechanism for looms, a rocking whip roll carrier having an operating rocker-arm, verticallyadjustable supports for said carrier, the longitudinally-movable tension-rod, and a slotted coupling member mounted thereon and in pivotal engagement with the rocker-arm.

3. In a let-off mechanism for looms, a rockshaft having supporting-arms for the whiproll, a depending rocker-arm having a laterally projecting stud, vertically adjustable stands on which the rock-shaft is mounted, a longitudinally movable tension-rod, and a coupling member thereon having an upright, slotted portion entered by the stud, whereby the connection between the rocker-arm and tension-rod may adapt itself to vertical adjustment of the stands.

In testimony whereof I have signed my name to this specification in .the presence of two subscribing witnesses.

JAMES H. NORTIIROP.

Witnesses:

. GEO. OTIS DRAPER,

ALBERT I-I. COUSINS. 

